koa2+redis+jwt token验证,简单注册登录

首先新建文件夹命名koa-server,npm init,相关包的安装就不说了,这是我的package.json

新建index.js文件,编码如下,config全局配置不用管,redis是一个简单的get和set操作的封装,也不用管

const bodyParser = require("koa-bodyParser");
const Koa = require("koa");
const koaStatic = require("koa-static");
const path = require("path");
const cors = require("koa2-cors");
const koaJwt = require('koa-jwt');
// const
const token = require("./model/paytoken")
const constroller = require("./controller");
const config = require("./model/config");
const db = require("./model/redis");
const app = new Koa();

//全局配置
global.config = config;
global.db = db;
global.secret = "tokensecret";
//设置静态目录
app.use(koaStatic(path.resolve(__dirname,"./public")));
//跨域
app.use(cors());
//post 参数解析
app.use(bodyParser());
//token验证是否过期或失效
app.use(token);
//容错处理
app.use((ctx,next)=>{
    return next().catch((error)=>{
        if(error.status === 401){
            ctx.status = 401;
            ctx.body = {
                code:-1,
                msg:"token error 401"
            }
        }
        else{
            throw error;
        }
    });
});
//token过滤规则
app.use(koaJwt({secret:global.secret}).unless({
    path:[
        /^\/api\/login/,
        /^\/api\/register/,
        /^((?!\/api).)*$/
    ]
}));
//导入controller middleware
app.use(constroller());
//启动
app.listen(config.port);
console.log(`server start at 3000`);

其中paytoken是token的解析与验证,在这里可以获取加密的相关信息,如userid等,这里保存到ctx上下文,保证是本次请求,命名token_data

const jwt = require('jsonwebtoken');
async function verify(ctx,next){
    let url = ctx.request.url;
    let authorization = ctx.request.headers["authorization"];
    if(authorization){
        let token = authorization.split(" ")[1];
        let payload = jwt.verify(token,global.secret,(error,decoded)=>{
            if(error){
                ctx.body = {
                    status:-1,
                    msg:"登陆失效"
                };
            }
            else{
                ctx.token_data = decoded;
                return next();
            }
        });
    }
    else{
        return next();
    }
}

module.exports = verify;

controller是路由控制,主要用于路由自动解析,原理是扫描controllers文件夹下的所有js文件,同时对其require导出,规则是必须导出前缀为"PSOT "或"GET "的路由,用于api接口的访问

const fs = require("fs");

function addMapping(router,mapping){
    for(let url in mapping){
        if(url.startsWith('GET')){
            //如果url类似get xxx
            let path = url.substring(4);
            router.get(path,mapping[url]);
        }
        else if(url.startsWith("POST")){
            //如果url 类似post xxx
            let path = url.substring(5);
            router.post(path,mapping[url]);
        }
        else{
            console.log(`invalid URL:${url}`);
        }
    }
}

function addControllers(router,dir){
    let files = fs.readdirSync(__dirname + "/" + dir);
    //过滤js文件
    let js_files = files.filter((f)=>{
        return f.endsWith(".js");
    });
    //处理每个js文件
    for(let f of js_files){
        let mapping = require(__dirname + '/controllers/' + f);
        addMapping(router,mapping);
    }
}

module.exports = function(dir){
    let controllers_dir = dir || "controllers";
    let router = require("koa-router")();
    addControllers(router,controllers_dir);
    return router.routes();
}

controllers文件夹下新建sign.js文件,处理login和register

const jwt = require('jsonwebtoken');
const db = global.db;
//注册路由
let register_func = async (ctx,next)=>{
    let name = ctx.request.body.userName;
    let password = ctx.request.body.password;
    let userdata = {name,password};
    let body;
    if(!name || !password){
        body = {
            code:-1,
            msg:"用户名或密码不能为空"
        }
    }
    else if(name.length < 4){
        body = {
            code:-1,
            msg:"用户名长度必须大于等于4"
        }
    }
    else if(password.length < 8){
        body = {
            code:-1,
            msg:"密码至少为8位"
        }
    }
    else{
        let data = await db.getKey(name);
        if(data){
            body = {
                code:-1,
                msg:"用户名重复",
            }
        }
        else{
            let result = await db.setKey(name,JSON.stringify(userdata));
            if(result == "OK"){
                body = {
                    code:0,
                    msg:"注册成功",
                    token:jwt.sign(userdata,global.secret,{expiresIn:'4h'})
                }
            }
            else{
                body = {
                    code:-1,
                    msg:"注册失败,原因未知"
                }
            }
        }
    }
    ctx.body = body;
}
//登录路由
let login_func = async (ctx,next)=>{
    let name = ctx.request.body.userName || "";
    let password = ctx.request.body.password || "";
    if(!name || !password){
        ctx.body = {
            code:-1,
            msg:"用户名或密码错误"
        }
    }
    else{
        let result = await db.getKey(name);
        let body;
        if(!result){
            body = {
                code:-1,
                msg:"用户不存在"
            }
        }
        else{
            let data = JSON.parse(result);
            if(data.password === password){
                body = {
                    code:0,
                    msg:"登录成功",
                    token:jwt.sign({name,password},global.secret,{expiresIn:'4h'})
                }
            }
            else{
                body = {
                    code:-1,
                    msg:"密码错误"
                }
            }
        }
        ctx.body = body;
    }
}

module.exports = {
    "POST /api/login":login_func,
    "POST /api/register":register_func
}

其中生成签名token代码如下

jwt.sign(userdata,global.secret,{expiresIn:'4h'})

接下来post请求/api/login,传入参数成功则生成token返回给客户端,否则失败,注意redis数据库必须有数据

或者/api/register注册,存一个新的

验证token只需要新建一个js,比如排行榜rank.js,如果前端没有在header中设置token或者token设置为不存在的,则会返回401,token error

前端附加token必须是(以vue、axios为例)

 

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posted @ 2019-08-16 11:25  保持当下  阅读(2296)  评论(2编辑  收藏  举报